A bunch of questions

Ok, we might be putting a full apartment in a basement. Can the bathroom be tapped into another bathroom that is directly above? Or what other options do I have for this, also We want to put in a dishwasher possibly and a kitchen sink. Any ideas on all this. And Where in the lines does it need to be vented?Laso, how to I find out where everything runs into the sewer line, cuz we are putting a seweage ejector thing in, so Ineed to find out where this will have to get connected. Thanks

That's a lot of work. Almost anything can be done, but it is hard to determine the costs without seeing it first. Can you see the drain lines coming down into the basement from above? Can you tell where it exits the house? If you are lucky, it goes all the way down and dissapears in the floor. If so, then you may not need an ejector system (best to avoid unless necessary). All of the things will need vents. Basically, you may need to tie all of them together and then either make a new one to the roof, or patch into the existing one upstairs above the highest sink level. Depending on the size of that vent, you may need a new one on its own. You may want to install a separate water heater which, if gas will also need a flue. Lots of things to think about. The incoming water supply lines may be marginal for another apartment.

thanks, I am inclined and have a basic knowledge of all this, and also have many books on it, I just can't find them right now, lol. It's not at my house, it's my grandmother's, so I'm not sure on all of that stuff, like wether it runs straight under the floor. For the vents, is there anyway to have it so it just comes out the wall and runs up the side of the house outside? This is like a split level house, so the basement walls only go up to about my shoulder, then it's drywall. If there are drains in the floor that means I don't need an ejector pump right? If I can't tap into existing water supple or something like that, then How do I get the water? Thanks.

The drains need 1/4" per foot slope, so depending on where it exits and how far you need to run the drains, you may or may not need a pump. I don't think an external vent pipe will pass code, nor does it look good. In theory, anywhere you can get access to a hot and cold water line, you could put on T connections and get water. But, ideally, it would be a larger pipe close to the source, or you may not get the flow that you want.

pastfast125,
I agree with the other responders. This is a major project, and based on your questions and comments, you really should hire a professional plumber. This isn't for a relatively inexperienced DIYer, and you can watch the plumbing pros and learn from them.
Good luck!
Mike

Ok, we might be putting a full apartment in a basement. Can the bathroom be tapped into another bathroom that is directly above?

If you are using a sewage ejector system, the pump can tie into a 4" waste line.
The plumbing that goes into the pump system needs to be treated like any other plumbing, including traps and vents for the traps. The vents can be tied into the next floor vent plumbing at 42" above the next floor.

The pump system will also have a 2" vent.

Or what other options do I have for this, also We want to put in a dishwasher possibly and a kitchen sink. Any ideas on all this?

A dishwasher and sink are like any other plumbing. Traps and vents for all.

How to I find out where everything runs into the sewer line? cuz we are putting a seweage ejector thing in, so Ineed to find out where this will have to get connected. Thanks

You can try bending some metal coat hangers and witching for the lines.
This works pretty well if there aren't too many other lines to confuse the coat hangers.

k thanks, I found some sites too that really helped explain a lot of this. For horizontal running drains for like toilets and stuff, what is the max distance horizontally you can run them? And if the toilet is to far away form a main vent line then I just make another line to the roof correct?Also I read about putting 45 degree angled t type fittings that go outside for snaking in case something gets clogged, do I have to do this? Cuz for it being in a basement I don't know how I'd do that. If any of that made any sense, thanks.

Some plumbing software that will lay out the design of the plumbing system might help you, but you may have to jack up the floor to get the existing w portion of the DWV specs. to imput into the program If it is under the floor. Or like Terry said you can try witching with coat hangers to find them.

You need to have a mech. drawing for sure. Lazer levels work great for checking pitch when you go to do the work.

hj, I appreciate your concern, but I'll worry about whether or not I can do it when I look more into it.

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That is fine, but most DIY'ers get a lot further than that before they decide they are out of their league. And at that point they either call in a professional, who may have to undo everything and start over, or muddle through and create something that they decide will work just fine. I am reworking two remodels right now that were done by workers like that.

What size copper pipe is reccomended for the suplly lines to everything? Do you guys recomend using a bender rather than different fittings to make turns around corners and stuff? Also whatever size is reccomended, is that 15mm? 22?? And abs pipe is used for the drains, what size is good for that? or does it depend on the application?